With Dustin Johnson suddenly uncertain for the 2017 Masters because ofa back injury, his odds to win the first major of the men's golf season have risen, according to online sportsbook Bovada.

Johnson, the world's No. 1-ranked golfer,is now Bovada's third betting choice at +750 (bet $100 to win $750). Jordan Spieth is now favored to win the green jacket at odds of +650, followed by Rory McIlroy at +700.

Johnson's manager, David Winkle,told reportersJohnson hurt his back Wednesday when he took a spill down some stairs at his rental home in Augusta, Ga. Johnson quickly began icing the injury and taking anti-inflammatory medication. Winkle said there was "hope" Johnson would play Round 1 of the tournament Thursday.

If Johnson does play, he'll have a little more time off his feetthan the rest of the field. He's slated totee off last at 2:03 p.m. ET. He'll be joined by Bubba Watson and Jimmy Walker. You can see the full Masters tee times and pairings here.

Updated 2017 Masters odds

Bovada's updated odds to win the Masters as of 9 p.m. ET Wednesday:

Jordan Spieth +650

Rory McIlroy +700

Dustin Johnson +750

Jason Day +1600

Hideki Matsuyama +1800

Rickie Fowler +1800

Justin Rose +2200

Jon Rahm +2500

Phil Mickelson +2500

Henrik Stenson +3000

Adam Scott +3000

Justin Thomas +3300

Paul Casey +4000

Sergio Garcia +4000

Bubba Watson +4500

Brandt Snedeker +5000

Louis Oosthuizen +5000

Marc Leishman +5000

Tyrrell Hatton +6000

Brooks Koepka +6600

Russell Henley +6600

Daniel Berger +7500

Matthew Fitzpatrick +8000

Thomas Pieters +8000

Charl Schwartzel +8000

Patrick Reed +8000

Adam Hadwin +8000

Lee Westwood +7500

Matt Kuchar +8000

Tommy Fleetwood +8000

Alexander Noren +8000

Bill Haas +8000

Branden Grace +10000

J.B. Holmes +10000

Jimmy Walker +10000

Gary Woodland +10000

Danny Willett +12500

Kevin Kisner +12500

Zach Johnson +12500

Charley Hoffman +12500

Emiliano Grillo +12500

Martin Kaymer +15000

Rafa Cabrera-Bello +15000

Ross Fisher +15000

Shane Lowry +15000

Bernd Wiesberger +15000

Jason Dufner +15000

Ryan Moore +15000

Soren Kjeldsen +15000

Francesco Molinari +15000

Brendan Steele +20000

Byeong-Hun An +20000

Jim Furyk +20000

Kevin Na +20000

Pat Perez +20000

Andy Sullivan +20000

Russell Knox +20000

Angel Cabrera +20000

Hudson Swafford +20000

Hideto Tanihara +25000

Kevin Chappell +25000

Webb Simpson +25000

William McGirt +25000

Scott Piercy +25000

Steve Stricker +25000

Chris Wood +25000

Jhonattan Vegas +25000

Fred Couples +25000

James Hahn +30000

Jeung-Hun Wang +30000

Bernhard Langer +30000

Roberto Castro +40000

Sean O'Hair +40000

Curtis Luck +50000

Si Woo Kim +50000

Ernie Els +50000

Yuta Ikeda +50000

Billy Hurley III +50000

Brian Stuard +50000

Daniel Summerhays +50000

Mackenzie Hughes +50000

Rod Pampling +50000

Vijay Singh +50000

Scott Gregory +100000

Brad Dalke +100000

Ian Woosnam +100000

Stewart Hagestad +100000

Toto Gana +100000

Jose Maria Olazabal +150000

Trevor Immelman +150000

Mike Weir +150000

Larry Mize +250000

Mark O'Meara +250000

Sandy Lyle +250000

Phil Mickelson +2500

Live Masters leaderboard

Follow the entire tournament with our live Masters leaderboard and get live updates and highlights at our Masters tracker.